Question

During a negative beta decay.

• A. An atomic electron is ejected
• B. An electron which is already present within the nucleus is ejected
• C. A neutron in the nucleus decays emitting an electron
• D. A part of the binding energy of the nucleus is converted into an electron

Answer 1

The correct option is C A neutron in the nucleus decays emitting an electron

Negative $\beta$ decay is expressed by the equation
$n\to p+e^{-}+\overline{v}$.
So, a neutron decays into a proton and a negative beta particle (i.e electron) along with a anti-neutrino are emitted.